The airline said within hours of the crash that they believed there was “nothing wrong” with the 777-200. Boeing isn’t commenting as the investigators continue to gather more details about what went wrong.

The NTSB reports the pilot of the Asiana Airlines flight requested a “go around” 1.5 seconds before the crash.

Aviation experts say when the pilot is instructed or decides to “go around,” the pilot applies full power to the engines.

Boeing and Airbus jets use fly-by-wire systems with go-around modes that automatically set maximum available power and pitch for that maneuver.

Hersman says the “black box” audio recorder indicates the pilots did not discuss any aircraft anomalies as they approached the runway in San Francisco.